PMID- 10413105 OWN - NLM STAT- MEDLINE DCOM- 19990809 LR - 20190621 IS - 0014-5793 (Print) IS - 0014-5793 (Linking) VI - 454 IP - 1-2 DP - 1999 Jul 2 TI - Interaction of soluble and surface-bound heparin binding growth-associated molecule with heparin. PG - 105-8 AB - The interaction of heparin with heparin binding growth-associated molecule (HB-GAM) was studied using isothermal titration calorimetry (ITC) and surface plasmon resonance (SPR). ITC studies showed that, in solution, heparin bound HB-GAM with a deltaH of -30 kcal/mole corresponding to a dissociation constant (Kd) of 460 nM. The stoichiometry of interaction was 3 moles of HB-GAM per mole of heparin, corresponding to a minimum heparin binding site for HB-GAM of 12-16 saccharide residues. Kinetic measurements of heparin interaction with HB-GAM made by SPR afforded a Kd of 4 nM, suggesting considerably tighter binding when HB-GAM was immobilized on a surface. Affinity chromatography of a sized mixture of heparin oligosaccharides, having a degree of polymerization (dp) of > 14 saccharide units, on HB-GAM-Sepharose demonstrated that oligosaccharides having more than 18 saccharide residues showed the tightest interaction. FAU - Fath, M AU - Fath M AD - Department of Chemical and Biochemical Engineering, University of Iowa, Iowa City 52242, USA. FAU - VanderNoot, V AU - VanderNoot V FAU - Kilpelainen, I AU - Kilpelainen I FAU - Kinnunen, T AU - Kinnunen T FAU - Rauvala, H AU - Rauvala H FAU - Linhardt, R J AU - Linhardt RJ LA - eng GR - GM38060/GM/NIGMS NIH HHS/United States GR - HL52622/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (Carrier Proteins) RN - 0 (Cytokines) RN - 134034-50-7 (pleiotrophin) RN - 9005-49-6 (Heparin) SB - IM MH - Animals MH - Binding Sites MH - Calorimetry MH - Carrier Proteins/*metabolism MH - Chromatography, Affinity MH - Cytokines/*metabolism MH - Dose-Response Relationship, Drug MH - Heparin/*metabolism MH - Kinetics MH - Swine MH - Thermodynamics MH - Time Factors EDAT- 1999/07/21 00:00 MHDA- 1999/07/21 00:01 CRDT- 1999/07/21 00:00 PHST- 1999/07/21 00:00 [pubmed] PHST- 1999/07/21 00:01 [medline] PHST- 1999/07/21 00:00 [entrez] AID - S0014-5793(99)00785-1 [pii] AID - 10.1016/s0014-5793(99)00785-1 [doi] PST - ppublish SO - FEBS Lett. 1999 Jul 2;454(1-2):105-8. doi: 10.1016/s0014-5793(99)00785-1.